To be fair once you have a foothold you don't really need a navy anymore, only to transport as much troops as necessary to defeat them on land and after that you can slowly eat them. Once you get a foothold, it's basically game over for Britain. Nice run though, that sudden big France though...I got a foothold in the British Isles by annexing Tyrconnell who was allied to Britanny when I invaded them, but I never cared building a navy.
Must have happened very early, since the only way you would get animist rebels in that position would be from conquered tribe land (colonized land in CN territory automatically becomes true-faith and primary culture)....You know, I was so caught up in finally winning that war and that big, beautiful yellow Europe that I didn't even notice that. I honestly don't know how or when that happened. Maybe rebel demands over the course of our war? I'm honestly not sure.
You'd have more luck creating your own thread to be honest. More people would see it. I'm in too much of a CK2 mood for tonight, but if noone answers I'll have a look tomorrow.